(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*

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Concept Search - What can I type?

For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.

Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.

Transistor Q turns on and drives a load through transformer X, and during Q
off time transformer X recovers against the clamp. Q has its emitter connected to
inductor L tap 10. One end 12 of L is connected to the base of Q, and its other
end 14 is connected to the voltage supply return 16. The other bus 18 of the
supply feeds a start-up pulse through resistors R1, R2 and capacitor C when
voltage is first applied to 18.

To define a cycle of operation, consider Q to be coming on. Q receives
regenerative drive from 10-12 and L is driven with load current through Q,-10, 14,
until Q is in hard saturation. At this point, although L-saturates, Q remains on in
storage. At the beginning of depletion in Q, and current fall, the voltage of L
reverses, driving the stored charge out of Q rapidly.

The magnetizing current in L continues and begins to charge capacitor C
through diode D; zener DZ clips the voltage. When the inductor current has died,
C discharges through diode D backwards to build current up in L in the reverse
direction. The voltage of C goes through zero and rises until its coupling through
10, 12, to the base of Q, turns Q on, completing a cycle.

Control is established by feedback from the output that causes
a drain on the charge stored in the base of Q. The more that is
removed,...